I agree if one is not informed or is clueless about the usage of acids then they should not go that rout, it does require a bit of reading & safety education to be certain of what to do, such as add water to acid but not acid to water, glasses, gloves, only outdoors unless vented etc... Safety first always.
I used to reclaim precious metals using HCL & Nitric acids, Muratic is almost nothing compared to Nitric, sulfuric in fact is worse. That being said IF HCL is used in a diluted state "only with pure water" its very safe, only bleach or chlorine is bad, such as city tap water which has chlorine as that will then combine to form chlorine gas. Distilled or RO water is fine however.
I would not do rocks in full strength HCL as many say to do only diluted, that way organics don't react violently..... but slow & gently, safer for the end user. Patience is a virtue in this hobby in every aspect.
Ultimately its the users choice but everyone in the Continental US sells HCL ( Muratic acid) openly so its not a big deal.... at least here, its used for concrete cleaning mostly (which is why its so good for cleaning rock) & plumbing cleaning in some drains after rodding, if grease is not the issue.
As long as no chlorine is added its stable.