If you read the article more carefully, he actually imply there are 16 mining pools (who mine at least a block) in 1000 blocks in 2022.
TH/s
As far as I know, the most energy efficient small home miner is Bitaxe Gamma (corrent me if am wrong) and costs 245 USD. Each has around 1.2 TH/s, so you would need 3 of them, or 745 USD, to protect your own share of BTCs (assuming everyone does the same).
745 USD is 7% of your BTC value (10 000 USD, or 0.1 BTC in this case). If USD price double, probably the total TH/s will also double, so you would need double the THs power to keep up. This means, 7% of your BTC USD value should be in a small but cost efficient miner. no matter at which price BTC is.
Let's not forget that hashrate (usually) increase over time and we see more efficient ASIC chip every few years. So if someone were to follow your idea, they need to buy ASIC every few years just to keep up.
This is like having a 10 000 USD bike, with no locker to protect it against thieves. Some people have even 100 000 USD bikes, or 1 000 000 USD bikes with no lockers!
This analogy would work better if you talk about securing Bitcoin wallet by buying hardware wallet or device only for managing Bitcoin.
I suggest we should disencourage people from seeing mining just as a profit tool, but as a tool to prevent BTC from crashing.
To the owner of online BTC profit calculators: please make clear that mining is not only for short term profit, but that is also to protect the network. The opportunity cost of not mining yourself is allowing the network to be attacked and everything going to zero.
For most miner, mining is business. I don't think they would bother do more than moving from pool with high hashrate percentage to low ones.