To think that this is enough for some people to upgrade and spend thousands of dollars for
These MacBook Pros are marketed to professionals; I've never understood this sentiment. A good segment of the consumers these machines are engineered for are using them to facilitate their careers in development, design, music and video production, and numerous other industries. These are pivotal to those individuals' doing their work. In some cases that additional power equals time savings, which can translate directly to more income.
So yes, it is enough. I spent over $4k on my 16" MacBook Pro without thinking twice; as a Product/UX Designer, it's the main tool I use to earn a very good income. I will upgrade with nearly every hardware refresh to ensure I'm getting the most from my machine.
Long story short, if it's too much machine for you, there are other, less expensive options available.