Yeah baskets will always attach by nuts and bolts so a thief can't just take them without using any tool. Less attractive to would-be thieves too.
The lightweight pannier bags I have are real nice though because I use the same bike for long recreational rides. Less weight is always better for long rides. The bags are sometimes used during these rides like when buying cheap produce from roadside vendors so I realized, it would be nice to have them on the bike all the time.