We can talk endlessly about strategy and long term implications (for example, the destruction of the Iranian "ring of fire" network of proxies, the permanent changes in Syria and Lebanon, etc), but consider something much more basic: Israelis around Gaza can finally live securely. There are no rockets coming from Gaza, no mortars, no chance of another October 7th or smaller incursions as long as the Israeli military is there. Israelis have peace. No Gazan rocket can disturb the life in Tel Aviv or Ashdod.
This couldn't and shouldn't have been a re-run of the countless previous clashes with Hamas. Israel needed to go all out to change the security situation, permanently.