I think you also have actually answered the question which is that it is the perspective at which people see bitcoin or the some of the disadvantages people attach to it, first is the transaction fee, most of the daily transactions are usually small amount transactions and the transaction fees at times are not that low to actually allow users to use it smoothly. Another is the confirmation, for a bitcoin transaction the widely accepted number of transactions for which payment are accept is usually 3 or 6 confirmations and sometimes it takes the network almost 10 minutes or more to get a single confirmation which means this isn’t suitable for transactions were you just wish to get somethings done fast.

So for me bitcoin isn’t used yet as a payment option for daily transactions because people aren’t really ready to sacrifice for it evolvement as such but will rather have it as an asset which gives them more profit holding than the other options