Ford wants to make money to sell cars. Ford would go bankrupt if catch cans would be installed on all of their vehicles. Ford makes money from a lot of current customers that have engine issues and need expensive repairs and some would just trade in to get a different car.
The current gen 3.0 would go for 200K miles easily because the engine is good and and there are no issues with coolant leaking and mixing with oil like it did in a previous gen.
If I were buying a 6th gen Explorer and wanted the most life from it I would pick the 3.3L hybrid engine. It is N/A and won't suffer the turbo failure(s) the ecoboost engines are going to see well before 200k miles is reached. The hybrid will eventually have battery issues but I would rather deal with it than possibly two turbo failures along with a possible engine failure. Especially if the engine is not under warranty. European automakers started building in planned obsolescence back in the 2000s. Most manufacturers (Toyota and Honda excluded, IMO) have followed suite. Ten years, or so, down the road the cost of many repairs will equal, or exceed, the vehicles value. Vehicles being "repair totaled" is becoming more and more common.
Also, if I bought a new vehicle these days I would be maniacal with fluid changes. I wouldn't follow manufacturers recommendations. Especially for the transmission. Replacing, or repairing, today's 8-10 speed transmissions will be hella expensive. Ford says transmission fluid is "lifetime" or 150k miles. They say coolant is good for 200k miles. I wouldn't go more than 50k-60k miles without a transmission pan drop and filter replacement. Or more than 100k miles for coolant. Ford doesn't even recommend a maintenance interval for Explorer differentials and transfer cases. I would change all these fluids every 100k miles. Sooner if I towed anything heavy regularly.