Paris-Roubaix isn't usually in July, though.
There is speculation following the fact the Giro wasn't warned or told about any sanctions other than risking a fine (which is what was stated to be the punishment in the UCI's official communications) until after the fact and its status was revoked was partly to do a plan on ASO's part to clear the calendar for their mooted stage race from 2022. The Giro Rosa being a more established and historic race already in that calendar slot is an impediment to them, and La Course has been allowed to stomp all over historic races left right and centre already, but with their reticence regarding coverage around races like the Ardennes, they need to keep the UCI onboard, and with Paris-Roubaix being a new ASO race, they need to behave themselves with it. Obviously cancelling this year's is no issue given the circumstances, but will be interesting to see how it shakes out in the coming years.
And by 'interesting', I mean 'very worrying for the established traditional women's races'. ASO, as I've mentioned before, has been losing a lot of money on the Dakar in recent years and props it up with their cycling endeavours which make a lot more money. They need to ensure that any additional cycling commitments they make will be profitable, and having had to spend more money than they normally would this year (in securing coverage guarantees for races that historically have taken place in the dark), if they're being committed to more races, or bigger/longer/more expensive races, then they are looking at making sure it is worth their while to do so. And as we've seen from the way the Route de France (7-9 days) and Trophée d'Or (4 days) were irreparably damaged by the loss of their spot to La Course (1 day), and the moving of La Course to mid-race forced a calendar change to the Thüringen Rundfahrt (7 days), the fact they would now be moving into a position that puts them directly face to face with the single most prestigious race on the women's calendar is potentially threatening.
At the same time, the Giro's organisation has been a bit complacent this last few years what with their prestige being pretty inherent as the only remaining GT for women, so a bit of competition will hopefully spur them to improve their offering and compete. Perhaps RCS can be brought onside to provide more assistance than their licensing etc., so that the race's infrastructure can catch up as the off-bike side of things has suffered in comparison to races like the Women's Tour. The Giro retains the higher prestige because of the more challenging terrain, the length and the history, but the longer some of these other races last, the less it can rely on that as an automatic guarantor of their prestige and pre-eminence in the calendar. A short stage race in the UK or the Low Countries will never a true GT make, due to parcours limitations, but a proper La Course (along similar lines to the one I'm working on in the Race Design Thread in fact) clearly could - and would - be a threat to the Giro proper.