I see your perspective of it and Im sure there are lots of people who engage for that reason.
- Maybe the majority-
But if I have a buddy on my network who posts something that I noticed took some effort on their part and provided me value, Id want them to know it did so. -Sure I could send sats and I might do so, but a like with sats might be a double tap.
If I know them in the real world I might just tell them when I see then next but, if I dont know them in the real world Id want to acknowledge their post even if I may not have much time to fully flesh out that acknowledgement.
Ultimately, what Im getting at is that this might be a "throwing the baby out with the bathwater" kind of situation