playing tight is fine. but you need to be aware of stack sizes and when it's a good time to do things with particular stack sizes. like 12bb and below you are best off just open shoving if you plan on entering the pot. 12-25bb you are best off riase/calling or 3bet shoving over raises, to give some very basic ideas.
In general good players will have larger stacks on average than the field. So if you are constantly below the average stack size, then you are likely not a good player, no offence intended.
Good players also tend to bust out alot more but also make way more deep and very deep runs because they are risking their stack more at 20-40BB stack depths and not waiting for the blinds to escalate and blind them out of the tournament. They understand it's better to be an underdog or 50/50 with a 40BB stack than be a 80% favourtie with a 10BB stack just to give a few examples.
So yeah if you have never hit bubble with more than a 20bb stack something may be wrong, it really depends on the structures you play. Since they are likely turbo/hyper turbo that might not be a big deal at all. And since it's a freeroll, you have to understand that you have invested nothing but time. So chasing those bigger stacks will help push you into more final tables and also give you more exp for playing bigger stacks which will help if you plan to play real money