Do you think smaller framed people - thin bones etc should focus on higher reps and lighter weight?

I have been thinking of starting to workout but honestly it just seems like asking to get injured and not gaining anything from it.

I am starting to think if you're naturally thin framed and not athletic doing 8 - 12 reps at moderate weight is probably not a good idea, maybe 20 reps + at lighter weights might be better for someone of this type?

Also maybe a smaller framed person might be more likely to be Type I / slow twitch muscle dominant too.