So what is with this Bronze mentality after losing a Tower?

Not really sure, what happened or why this is pretty common,

But what is up with Bronze mentality of Giving up your entire lane the moment you lose a tower.

Last game I was winning my lane, Then suddenly bottom lane got ganked by mid and lost their tower.

For me i'm like what ever they can farm now no big.

Yea no. Instead, Bottom just gave up their lane completely they went mid and start 4v3 mid. Dying over and over to their jinx Leona, and diana

So with no pressure bottom lane what happens? I now get camped Top by Vi and Kayle no help at all cause my jungler, mid, adc and support are stuggling vs the enemy 3

its like We have siver, lux, graves, and leblanc there , and they are just getting crushed by the others.

needless to say Enemy jinx left go to free farm bottom took another tower. then I lost top tower cause i'm getting tower dived by a shielded vi now.

Ugh Any ways.. Seriously mentality wise am I the only one who gets teams like this or is this a pretty common thing now?

and did I miss some thing that after you lose your tower you're suppose to just abandon your lane?