The problem is not that cessationism deny
that God is working still with miracles and healings for his gloryfication.
The problem is that since Topeka and Azuza a New teaching arose among Christians which claims that the spiritual gifts (tongues, prophecie, healings) are today the same as in the time of the apostles.
New is, that speaking in tongues is the visible sign, that somebody is baptised with the Holy Spirit. This teaching was not in the churchhistory, nor in the NT taught. Out from Acts 2,8,10 and 19 which can seen as sign for the jews an doctrine was createt which never was taught to the Christians. No Single Letter to the churches mentioned this teaching.
I would agree that Classical Pentecostalism, IMO, takes the pattern of tongues accompanying Spirit-empowerment a bit too far. In general, Pentecostals do not believe that if someone believes in Christ and he does not speak in tongues, that he is not saved. maybe 5% of Pentecostals believe that. They are in a separate, non-trinitarian movement.
And the fact, that today pentecostals and charismatics cant show that healings and prophecie are in the same quality like in the Apostles time reveals that there is something wrong.
Just like in the first century, there are true prophets and false prophets.
And healed is healed. If someone is healed, that person is healed. There have been numerous supernatural healings, Biblical caliber type miracles, in the Pentecostal movement.
Btw, did believers who had 'gifts of healing' in the first century mentioned in i Corinthians 12 have miracles that were the 'same quality' as the apostles.
And if someone is not be healed, then the reason is for shure his sin ore lack of faith,
That is not my experience, having grown up Pentecostal. You might find individual Pentecostals who think that way. It was probably more common in the Word of Faith movement in the 1980's than among Pentecostals.