I really like that airlines sell these two types of tickets nowadays, one with check-in luggage up to 30kg and one without. Therefore, if you travel you can actually save and if you really need to have big luggage up to 20-30kgs you can pay the extra.
"Premiun" airlines used and still some includes big luggages in every ticket, so basically if you travel ligth, you end up paying other peoples luggage.
And environmentally, every kilo counts when you are flying.
Yes, that's a great point! The airlines are definitely giving passengers more options when it comes to luggage. The a la carte style tickets are veery popular right now, where you can add as many options as you want.
At the end of the day, they are still making lots of money on these fees whether it's built into the ticket or not.