It's more like "I like it but I don't think it should get money" which is something that has already been discussed numerous times. We have somewhat of a version of that already with payment-declined posts, but of course those are based on the poster saying not to give them money which is not quite the same thing.

Alternately it could be more specific reactions than "like" such as "funny" "interesting" etc. which also don't necessarily imply that you think it should get money.

I agree there some obstacles but if somehow voters don't start directing rewards toward meaingfully value-contributing activities then @yabamatt's point about investors not seeing the value in buying into something that is going to be inflated away to pay for content for its own sake are going to turn out to be correct, and demand will continue to evaporate.