There are things apart from humans for guarding.
Mossad is supposedly the greatest intelligence agency.
“Gazans tried to swarm Israeli villages near Gaza in 2018.”
And Israel “adapted” by changing nothing. What does that tell you?
More importantly, if Israel isn’t capable of defending itself, can it continue to exist as an autonomous entity?
They are surrounded by a demographically increasing enemy, and the West, their defender, is destroying itself.
“ the West, their defender”
If “the West”, a/k/a the US military, is their defender then they have already ceased to exist as an autonomous entity.