It makes a lot less sense when pasting from other locations. Especially if for example you copy one sentence of a webpage that uses a specific font throughout, you are likely not expecting that font to be preserved, you weren't even thinking about it.
So probably they went for consistency, which ended up being the wrong choice. At the end of the day there are cases for both. Adding heuristics all day ends up confusing for the user so picking a default is hard.
Hippocratic Defaults: First Do No Harm.
Principle Of Least Astonishment (POLA).
Provide all possible damage and astonishment in the right-mouse pop-up. Caveat Clickor.
but who knows, maybe thats why dark-mode vs light-mode is still hard to implement, they have to deal with how copy-paste formatting works behind the scenes lol
edit: typos, fixup ideas
You can do the same thing by pasting, then click on the little box that pops up next to your pasted text, then clicking the text option.