Don't worry, I am asking this question in good faith. I am a big fan of the Universal Healthcare program in my country. So I am not using a cliché to try to dissuade anyone.
There seems to be a lot of misunderstanding about the nature of public healthcare on the internet. Often looking at them in a rosy picture. While ignoring the societal costs or the massive differences between implementations of these public services.
Then there are the costs. You can argue "tax the rich", but ultimately, these programs ARE expensive, and will be paid for by you, the taxpayer, in taxes, regardless of whether you are upper class or lower class. France spends around 12-13% of its GDP on healthcare. Most of that being in the public sector, which is paid for by you the taxpayer. That is a massive economic burden, and is significantly larger than the military budget. In order to make these costs not spiral out of control, the governments have a vested interest in maintaining the health of its citizenry. This manifests in a myriad ways, but mainly through government regulations on what we eat. Japan taxes corporations for hiring fat people who arent losing weight, Denmark taxes fatty foods (red meat, dairy, ect), Sweden taxes alcohol, and the EU impose heavy regulations on foods which is why Soft Drinks in the EU are a lot less sweet than they are in the US.
Which brings us to a cultural point. Most countries that have successfully implemented a Public Healthcare service, are often more on the collectivist side. But how would a system work in a more individualistic country like the US? Where concepts like "Personal Responsibility" and individual liberties are at the core of the country's identity. We have already seen strong reactions towards anything that uproots the status quo. Just look at the hysteria surrounding COVID guidelines, soft drink bans in New York and as of late, gas stoves.
With that said. I do enjoy my public healthcare, and I do believe most countries would benefit from having one, as long as they don't gut it (UK). So I shall ask the question, How will you afford public healthcare in your country?
As a swede, we pay for it via taxpayer money we all pay into. We regulate our food and we invest in our citizen's fitness, so we don't spend excessive money on unhealthy living. Our healthcare is decentralized to reduce bureaucracy, and run by local regions and muncipalities. It is mandated and federally subsidized, but the rest is up to the states. For further improvements, we could definately do things to encourage more daily exercise, such as by phasing out cars, or through fitness programs.
YouTube video with points similar to my own,