Why are they called lisps and rhotacism?

[Larkin N Likin]

and not lithpth and wotacism. It's kind of mean, don't you think?

 

[Disapproving Bread]

St...stuu...stutter is pretty bad too.
Not to mention Hippopotomonstrostoquiptadictaphobia.

 

[Hellspawn]

To assert dominance over the speech-impaired, obviously.

 

[Red Hood]

What's da one cawwed wheh you sound wike Ewmuh Fudd? Hehehehe.

 

[Larkin N Likin]

What's da one cawwed wheh you sound wike Ewmuh Fudd? Hehehehe.

the second one wetawd