There's a place for pitch invasions - when they're spontaneous and there's no serious threat to either set of players.
What's happened recently is something that's threatened to happen for a while. Fuck knows why. I could offer some guesses....
Fans being 'let off the leash' after lockdown absences? The utter obsession with selfies so many pathetic bastards have? The entitlement epitomised by the 'can I have your shirt' wankers? Above all, a general lack of care and respect for anything which has been encouraged by allowing protesters of certain causes to do and damage whatever they want - previous standards are off the table.
Clubs should do better with stewarding.
The fucking referees should certainly do better in giving time for the would be victims to reach the tunnel before blowing the whistle.
The authorities should also threaten points deductions for any pitch invasions that result in players being attacked.