Conclusion: mining is getting more and more pointless and that is happening in furious pace!
Your conclusion is wrong. If professional miners give up, you could mine at home because difficult Target will be adjusted back to an easier target
You should read the bitcoin whitepaper, Satoshi talks about this subject when halving is done and there is no more incentive to mine , just transaction fees. Just google for it.
I know, what Satoshi talks, Im pretty good in math and crypto in general. Problem is here: if mining in even nearly such amounts is not actually needed, why is it done now?
I know very well, that actual computing need for "verifying transactions" is 0,0001 of what is wasted now.
Satoshi on the other hand is just a nickname of head scammer, You dont even know, who he is.