Going a little "nice guy" AFTER you've slept with a girl is actually a great way to screen out crazy

Let's start with your second question(s).

Why would an alpha man care about whether other men are alpha or beta and why would an alpha guy desire/hope other men to be beta

I think you have a narrow idea of alpha and a broad ideal of beta. Alpha isn't this non caring aggressive oaf of a man (there are a few of course!), alpha can be tech investors, elementary school teachers, doctors, bus drivers. Alpha is a broad term. I wrote about this in another thread a few days ago.

In short, the alpha is the best adapted male of the group in a particular environment.

I have thought a LOT about the definition of alpha. Many posters and bloggers have tried to spin off the word with other ideas, situational alpha, alpha provider, natural alpha, alpha traits, alpha attitude.. on and on. I think your short definition is the most accurate and succinct from my personal experiences. Alpha is highly situational, yet still tied to some key factors. From the video: "If you've ever met someone and you were nervous when you were meeting them, you're not the alpha. We've all had the experience where were meeting somebody and we can sense when they're nervous meeting us; you're the alpha." This is also a great summary of 'alpha.'

So I think to cluster alphas together like that and assume all they want is a power grab is to over generalize. Even the dark triad type alphas know that they are working within a hierarchical social order and using, manipulating, and working with betas is just part of the 'game.' I think this is why you hear some on redpill say we 'need' betas. They are commenting from a Machiavellian perspective that we need betas to pay taxes, do low level jobs, sacrifice in war, etc.

As for your first question. I'm not sure I can really answer accurately because I don't know your age, education level, temperament, financial IQ, area, etc. Business's are risky even for gritty, wealthy, smart people. They are highly risky and downright stupid for lazy, naive, uneducated, poor people (I'm not assuming you are either of these of course!).

Since you mention 'career path' I'm going to assume you are still young and considering your major. Business is a better major then English, History, Psychology as far as marketability but there are scores of business grads that don't have access to jobs because it's much more profitable to start in a skilled trade and then realize a market within your trade and use your business skills to monetize a good Idea. I think business is a good second degree with more 'direct to a career' type majors like medicine, law, and accounting (although some don't have the prowess, aptitude, study skills, intellect, to double major).

Another great and very profitable educational route to take is accounting. It's not for everyone but after a few years at an accounting firm you can branch out and be a consultant or CFO for business's and then you will have the capital (as well as understand how to financially evaluate business plans) to start your own business with a much higher chance for success. There are also so many un-college educated small business owners that need financial/business minded people to help them with their business and they will pay handsomely.

If you're still in college and deciding on a major I'd recommend talking to professors and setting lunch with actual professionals in your fields of interest and asking them what will be 'in demand' in 5-10 years. You want to pick fields of study that 'will' be hot and make sure to ask specifically what is an under-serviced niche of the profession.

All that rambling aside business is still a solid major and if you don't want to be a wage slave with luck and hard persistent work it is potentially much more profitable then public sector, and most salaried positions.

This TED talk is also a must watch if deciding between an 'ownership' business type path or a salaried type path.