That’s just stupid. Are they really suggesting Ukraine should focus solely on grinding through fortified Russian defenses?
That's clearly a losing strategy, too, but the "we'll fight them to the last Ukranian" crowd is still too far from reality to admit it.
The best decision for the Ukranian people is to negotiate an end to the war as soon as possible, which means accepting that when you are losing a war the peace isn't going to involve crazy shit like getting more territory than you started with (Crimea). They've lost, and they can come to terms with it now or do so later after a bunch more Ukranians die only get a worse outcome.
The reason the Ukranian government isn't doing that is because their NATO puppetmasters don't give a shit about the casualties of their proxies -- they just want to bleed Russia as much as possible. So without the option to negotiate, and with the impossibility of winning on the main front, they have to try Hail Mary gambits like the Kursk invasion.
The only way this can turn around for Ukraine is a the war expanding into a (more) direct conflict between Russia and NATO, which would create a high risk of a nuclear exchange, which is unacceptable.
Ukraine lost. The only question now is how many more of their people they'll send to pointlessly die before they start serious negotiations (i.e., not wild demands like getting Crimea). This is the months leading up to the end of WWI.