Why maturity rule on coinbase tx requires too many confirmations w.r.t an arbitr

[TinfoilHat]

For an arbitrary tx, it is often said that 6 confirmations is sufficient. However, maturity rule states that coinbase tx can't be spent until it receives 101 confirmations. Why do we have this disperancy?

Why 6 confirmations on coinbase transaction is not considered as sufficient for example ?

[ranochigo]

"Normal" transactions and Coinbase transactions are pretty different.

For "normal" transactions, the inputs are referenced from another transaction and so on. If the blocks were to get orphaned, those transactions are still valid and they can still be confirmed in another block. 6 Confirmations is a decent number of confirmations to deter attacks without 51% of the hashrate.

For Coinbase transactions, there isn't a referenced inputs for there. If the block somehow gets orphaned, any subsequent transactions from that coinbase transaction would immediately be invalid as well. This could affect many transactions, as long as they are linked to that coinbase transaction. The more confirmations there is, the harder it is to happen.