Nah not really a good reason.. more than i have alot of HSS blanks now a days.. and ive made a small grinding jig for setting angles and so on...
That is actually one of the best reasons on my book

TCG, no idea what that is..
tool cutter grinder
Try that one on google picture search - least looking all those different forms of TCGs keeps me entertained for hours.
...But i do think that carbide tip on a proper toolshank is a better solution actually..
i have been experimenting with holding a small carbide insert tool in my fly cutters as well but i tend to break the tips more than once.
I have good chunk of iron on MT3 and I put there baddest russian carbide bit I had (Somewhat bigger and thicker than CCMT09 with really BIG r) and never had a trouble.
The slender holder has been machined out of round rod (was easier to get angles right to something....that was long ago I forgot for what

).
The attached holder is a funny one....I needed to cut on recess, therefore I need small diameter flycutter. I got my boring bar later. Maybe this explains something.
Pekka