Tokiomi seemed utterly convinced if Sakura didn't become the head of some magus family she'd both become mediocre and waste her talents and, more importantly, have no protection from Sealing Designations or, even worse I imagine, being abducted some crazy magus and being experimented upon or some other horrible fate:He just had the bad luck to live next to a crazy heretical magus who masqueraded as a model citizen and was remembered for his kickass feats like the creation of the Command Spell system.
Considering how he felt bad about the fact he was essentially making decisions for their futures without giving them the chance to choose whether they wanted to or not, it kind of makes me wonder what Tokiomi would think of Shirou considering he chose his path despite the hardships he encounters.
Or the fact both his daughters fall for this guy who is practically a 1st-gen magus who can summon up an RM within a relatively short amount of time.Honestly, I think someone here put it best, is that Tokiomi is like those parents who see their kid has a talent in something and then imagines they'll become a professional sports star or Olympic athlete or professional musician/concert pianist or violinist and then relentless chooses their future for them because they think it'll make their kid happy.
But then, the sad part is that he chose their paths for them. They didn't get a choice to choose it for themselves. Maybe they grew into choosing it for themselves, like Rin, but he still felt he had to take the choice away.
EDIT: Honestly Tokiomi seemed to have this idea that the Matou would be so incredibly grateful about having a super heir that Zouken would teach Sakura everything and she'd be the head of the Matou, because she's so super valuable.
The issue is that, when you think on it, you start to realize she's the head of a family that has pretty much fallen off the wagon magic-wise. Beyond Zouken, and the wealth she would have access to, there doesn't seem to be anyone else who could help if and when she would be producing an heir of her own.
I mean the only people who can do magecraft are Zouken, Sakura, & Kariya. Three people. Two only if we ignore Kariya because he ran off.
I mean there doesn't seem to be any real prestige to the family because I don't know if Zouken is even famous really.
Makiri Zolgen is famous but Zouken seems to mostly just hide out in Japan.
Hell even resources wise, while the Matou are loaded I really wonder if any of that can help because who the heck wants to marry into a family that is dying out is what I wonder.