'Fruit' is used as a singular and plural in English. 'These fruits...' sounds terrible.
I agree that fruit without the 's' is the preferred form of the plural in English.
"The fruit is expensive here" is the more common English way.
"The fruit here is expensive" is another form.
I disagree with "This fruit" as that is too specific and would refer to one type of fruit rather than plural.
For example "This fruit is only grown in this region" might be an exotic species of fruit.