(And in fact, in my experience, it is getting easier with online applications becoming more common.)
I’m American and every visa I’ve had to apply for did not require my physical presence at the embassy and I used a third-party processing service to get everything done.
Therefore, while I would need to apply to these countries from their US embassy because my physical presence was not required, I would generally not need to return to the United States to obtain their visa?
And this aspect of a US visa does make it significantly harder even though the application policy is similar to other countries?
That said, back in the 2000s I had to apply in person at the French embassy for a student visa, in in the 2010s I had to apply in person at a Chilean consulate for a special visa.
Many countries have outsourced the bulk of their processing to contractors like VFS or TLS these days. But also, our experience as Americans is not representative as we generally have fewer visas we need to bother obtaining, and face less scrutiny when doing so.
I'm not sure if the US interview requirement makes it "harder" to get a US visa - it may be that getting a US visa is just harder than getting another country's visa, which might still be true even if we didn't interview people. The big thing that makes getting non-immigrant visas to the US difficult for many people is that, unless shown otherwise, US immigration law assumes you are an immigrant.
https://bkpk.me/peru-visa-for-indians/
The San Francisco consulate of India refused to process my spouse’s Indian visa because she was not resident in the US.
https://bkpk.me/how-we-finally-got-zaras-visa-to-india/
Several more examples but in this day and age you can just ask chat gpt to summarize for you. But if you check visa application requirements for many embassies, they will often say: proof of residence if not a national of the country of application. So that’s the requirement often.
I will add though that I’ve always maintained that this is a soft policy and they will make exceptions in some cases. It is mostly consulates wanting to do as little work as humanly possible. So there can be ways to get around it if you can talk to someone in charge. But usually that’s very difficult with consulates.
I’m pretty sure though in the US’ case now it’s a hard no. So there will be no working around it.
An embassy will often have its own requirements based on the locality, whereas the visa requirements are uniform.
The Indian embassy in San Francisco might refuse to process non-resident applications but that doesn’t mean you can only get an Indian visa by going to an embassy in your country of nationality.
E.g. the NYC consulate: https://www.ny.us.emb-japan.go.jp/itpr_en/visa00.html
> You may apply for a visa at this Consulate if you are currently residing within the area covered by this Consulate.
Also, "a traveler without a fixed residence" can get a non-immigrant visa for Schengen? I'm sorry but this just is not true if you're not a Westerner.
If there is no doubt that you will leave and you can sustain yourself: sure.