Sure. But, perhaps, women can use their own minds to decide if they want to move to where these eligible bachelors are, or stay where they are, instead of discussing 'them' as an impersonal resource that should be moved around so that men can obtain them for the good of society (lol). If it's a 'concern', then perhaps the men from that society should engage in some self reflection on how they got there and treat their fellow human beings with some respect.
Women are human beings who have their own wants and needs beyond being child incubators. I can't believe I have to state this explicitly but here we are. Men are not entitled to sex, or babies.
That doesn't change the fact that potential population decline is a huge societal issue w/ massive repercussions. People
are a resource, and if you end up in a situation where births are falling below the replacement rate, you are going to be faced with declining tax revenues, workers, infrastructure, etc. None of which are pleasant, if you look at how cities in the US Midwest have gone through population loss.
Yes, they are human beings capable of making their own decisions, but government policy and incentives are going to change in reaction to these events. It was pointed out by someone on twitter a few weeks back (couldn't find the tweet) that China is doing a messaging about-face in response to the looming issues. Whereas previously in the '80s/'90s one child era they went full-tilt feminist, now they're emphasizing a much more traditional view of relationships.
This is not about male entitlement, this is about looming danger in the form of structural damage to their societies.