SHB BLM is the peak of this game's job design

[Acidblood]

<-- 1) I do play RDM. See, Main Class,
2) You aren't always going to have a Chocobo, consider Eureka (to which I'm sure there'll be some child of it later in the Xpac) or any number of instanced quests,
3) I'd argue for Physick to be buffed for SMN at the same time, but to address your point, they can also use Titan's shield twice in a row, can use it more often, and have a free heal on their Phoenix,
4) To my knowledge all DoWs have higher health pools and defenses to start with, so if we're arguing about the approximate value of Second Wind even returning only 15-20%, let's talk about how that compares to Manaward returning 30% of a caster's health pool, shall we? 'Cuz at the end of the day, it's about how many slaps you can take to the face, and mob damage doesn't scale down just 'cuz you're squishy.

1) Then why do you need BLM to also have self-heals?
2) So you want to balance jobs around Eureka now? :facepalm: (which has Logos actions BTW, and was never designed to be solo friendly). Special instanced content includes NPC / passive heals (if needed).
3) Good for them. Maybe you should consider playing SMN.
4) Yes, Melee have slightly higher HP pools, and better physical defence, though worse magical defence, they also tend to get hit more. Maybe you should consider playing Melee, I hear DRG is in a pretty good spot right now.