Then much of the rationale of blocsapp is lost for you, and ironically the subject of this thread wouldn't even apply to your use-case!
Quite true, they may be outdated and have no interest in the army of people for whom mobile and tablet is their principle form of access to the web. Or they may just be ignorant that this is todays reality.
Blocsapp is a bit unpredictable at times with selection and it's ease of use via classes can be improved. I just tried to set the background colour for the page body and have a transparent bloc, but I can't remove the colour despite the colour editor offering me an option for no-colour.
I have rarely made tables for any of the sites that I have made, but I accept it is important for you.
With care, you can make tables in blocsapp, but I agree as a dedicated table builder it is no good.
I don't mind blocsapp having a tablebuilder, but as I said it is way down on my priorities, so far down I hadn't thought about it as an omission.