33 psi is somewhat acceptable in the summer season during hot weather because excessive heat will over-inflate the tires. It is the rule of thumb that for every 10°C change in ambient temperature, tire pressure increases by 0.1 bar (1.45 psi), even when not driven, but it is NEVER recommended to underinflate tires because the tires tend to overheat, causing tread separation, premature and even wear, and blowouts in the worst-case scenario. So, it is the best practice to follow the company's recommendation during normal temperature conditions if not always, and in the case of Sportage, the company's recommended tire pressure is 35 psi.
The rest is your choice.
I hope it helps.
