Of course it can, more miners will enter and compete the fees down. We all wish more people used BTC right? Well imagine if an additional 10% of the planet decided to start using it, what do you think would happen to fees? Would you regret this 10% increase because of higher fees? Would you say the network can't sustain it?
LTC has low fees but has actually depreciated YTD. So if you want to use a known shit coin to avoid high fees for book deposits, go ahead but as you're holding that coin it's likely to depreciate on you which is its own cost.