The point is the bonus points for spending x in 3 months not the points for the spend. 60k bonus points for the first 4,000$ spent is definitely worth..most points are 1.5 cents or so.
This is about churning, not regular rewards. Sign up for a new card, pay taxes on it among other things to meet the spending requirement for the signup bonus, get “free” $$$ for things you have to spend anyway.
Except you don't get “free” $$$ for things you have to spend anyway...
You get points you can use for vacation or travel.
If you NEED to vacation or travel, it IS simply a smart transaction. But if you weren't spending money on travel before than it can still result in increased expenditure even if managed perfectly.