Here we go again…

How would they explain him to an audience that has not listened to the audios?

Does the BBC even have the rights to the character? He’s a good character for the audios, but it would be too confusing to have him show up on TV. Plus, since the TV show is post Time War, it would have to be either the Twelve or the Thirteen. Besides, the Time Lords are all dead again.

The tardis is a Time Machine remember

Because the best way to boost the viewer ratings is to introduce a character that only a small portion of the fanbase has ever heard of.

The Doctor can’t cross her own timestream, or cross the time lock around the time war.

Tbh while I adore the character, I think he wouldn't work as well on TV