Why should I have to Lower my sound recording standards to fit the very latest software?
As far as we know, the decision makers at Corel don't read this forum, and they certanly don't reply, so you're not going to get a real answer here... Maybe because although it's name is "pro" it's really "consumer software"?
For the price, it has lots of features but it's not perfect. If I need to do something that Video Studio can't do, I don't get stressed about it... I use another program that I already have, or I look for a program that can do it.
I understand your desire to maintain the best quality, and I agree it's stupid that Video Studio doesn't support 24-bits, which is very common and "automatically" supported by Windows.
But, don't worry about lowering your standards. There are reasons for using more bits (or floating point) in music production, but for your final output, 16-bits is more than enough.
The 16th bit (technically "bit zero") is more than 90dB down and you cannot hear it. If you don't have a feel for how quiet -90dB is, here's a simple experiment - Try reducing the 2nd half of a song by -90dB... Play the 1st half of the song as loud as you like (but not so loud that it's distorting) , and then don't change the volume for the 2nd half and see what it sounds like.