Why do assassins have some combination of wave clear, hypermobility and hard cc?

Back in the golden days of league the counter to assassins was to shove them in, but now they all have great wave clear and some have hard CC to go with it, and to top it all off, most of them have hypermobility to make them ungankable in lane, so they can just shove you all they please. It seems like it goes against the fundamentals of this game... Why would you pick a tank or a bruiser if you could just delete someone and CC people when you need to?

evolved spikes are basically an aoe snare, Hyper mobile with jump resets W waveclear and Chain hard CC, Instaburst, hyper mobile can clear waves pretty fast, hyper mobile, getoutofjailfree-smoke Super Wave clear, Hyper mobile Charm CC, wave clear, sustain, Hyper mobility, aids incarnate Hard CC, shields, wave clear, mobility, healing... Good thing he's gutted right now because this is probably the single most overloaded champ in the game hard cc, stealth, instaburst Hard CC, hypermobile Uh yeah, CC, Mobility, wave clear, sustain, shields Hyper mobile, wave clear, becomes the best ap bruiser with fleet while still being an assassin...

These champs are so overloaded at this point that things like glacial Ahri are becoming the norm. I honestly don't get the boner people have over assassins... How is being instantly deleted by a hyper mobile champ fun gameplay? It's just League of duty.