Paper can't destroy your septic tank (it's most likely a concrete box), but it can clog the lines that lead to your septic field. Solids settle to the bottom of the tank, the liquids come out the top into your septic lines/field. If too many solids build up (grease, paper, etc), you start putting solids in your septic lines. If paper (or anything solid) gets in the lines before it breaks down, you could have some clogging problems. Having your tank pumped regularly is cheap & good insurance against this - not to mention insurance against the subsequent hiring of a landscaper to clean up the mess that digging up & replacing of your septic lines & field (been there, done that).
BTW, our plumber recommends Scott's brand TP for septic systems - it seems to break down quicker.