No I think you misunderstood.
You can redeem your points at 1:1 ratio for flights & hotels directly on their platform as well. However, that cuts your base reward rate to half i.e. from 6% -> 3%, and accelerated reward rate from 36% -> 18% & 72% -> 36% (for flights & hotels respectively). This is pretty much similar return rate as TimesBlack I guess.
It is still pretty good, but if it is ONLY travel that you need this card for (not shopping) and you don't meet the 3L salary criteria, you're better off taking TravelOne IMO. It has almost same reward rate, and if you're not into Accor then the difference in final return rate is even smaller.
Premier account will not come cheap via investments route, and HSBC anyway has a strong bias towards salary account holders.