That’s pretty horrific. The working population is important to maintaining Ukraine’s ability to fight. It probably factors in Russia’s intent to finish the war instead of agreeing to a ceasefire.

Fortunately “lost” in this case doesn’t mean “killed or wounded”, but “residing in other countries and capable of returning home”.

Of course, if a considerable number of these people remain abroad after war has ended, then it’s a loss indeed.

But already until then, it’s big burden on the state budget (state has the same obligations to the old, but less working age taxpayers to gather income). However, there is also the effect of younger people working abroad sending money to their older relatives who remain home. To some degree, this might counterbalance the loss.