Most likely however is that he just didn't read the scroll yet as certain scrolls aren't available for purchase and you need to read those scroll first before you can use them. Maybe he even was not level 20 and miss out an other level 6 spell slot.
Further why others assume what players should have in their spell slots? I mean what is reconstruct good for a fleshy player anyway? Except of healing/repairing others, but if I would be keen on babysitting I could have rolled a Cleric instead
Not to mention that reconstruct may only worth it if you also have quicken.
Last but not least if one can make the expectation that an Arti should have Silver then one could have the same expectation of a Fighter having a Silver or Metalline weapon. Not that you can't buy them by any chance from a broker or the AH
Anyway none of those should cost any frustration ... just shrug or mention that he should consider changing his spells ... some players still can learn how to do it better the next time