For aesthetic or other preferences you change the default font to whatever you please. The default font shouldn't be about aesthetics, it should be first and foremost about usability. Especially on printed media since there it cannot be changed in a whim.
A couple of years ago I went into archives of Dutch newspapers to learn whether and how the famine of hunger in Ukraine (known as Holodomor) was reported back in 1930's. Fuck me, it was hard to read those excerpts. But it is what it is. OCR could've converted the font. The problem is, is the OCR accurate? Like, is my search with keywords having a good SnR, or am I missing out on evidence?
Personally, Times New Roman was likely the reason I did not like Mozilla Thunderbird. I have to look into that.