While I share your reservations with solid rockets as a main propulsion system on a manned rocket, it turns out they are well suited for launch escape systems themselves for some of the same exact reasons: they’re simple and powerful.
> While I share your reservations with solid rockets as a main propulsion system on a manned rocket, it turns out they are well suited for launch escape systems themselves for some of the same exact reasons: they’re simple and powerful.
Interestingly, both Crew Dragon and Starliner have eschewed SRB based LES/LAS systems for liquid fueled hypergolic ones. You can tell this because neither capsule has a "puller" on the nose like Apollo/Orion does.
Yeah, that is an interesting decision, especially since hypergolics represent a completely different set of risks. But they are extremely reliable for this application.
