That is simply an assumption to dismiss a separate account that doesn't record the gift of tongues....
It is not an assumption. If you are not familiar with the concept of the First Mention Principle and how it applies when interpreting scripture you may want to look into it. A brief explanation is the first time a specific thing is mentioned in scripture its meaning will be consistent throughout the Bible and will be confirmed by at least 2 scriptures.
1. There is the gift of the Holy Spirit evidenced by speaking in tongues as first recorded in Acts 2. And mentioned by Jesus in Luke 11:13.
2. And there are gifts given by the Holy Spirit of which one is speaking in tongues for the edification of the church when someone with the gift of interpretation is present. (1 Cor. 12)
As for speaking in tongues as evidence that a person has received the Holy Ghost consider the following:
Peter's statement in Acts 2:33 confirms receiving the Holy Ghost is accompanied by speaking in tongues: "Therefore being by the right hand of God exalted, and having
received of the Father the promise of the Holy Ghost,
he hath shed forth this, which ye now see and hear. "
Jewish people-first mention: Of the 120 in the upper room every single person spoke in tongues upon being indwelt. No one was excluded. Acts 2:1-4
Gentiles receive the Holy Ghost in the same way as the Jews - first mention: Cornelius and his entire group spoke in tongues upon receiving the Holy Ghost. No one was excluded. Acts 10:44
The twelve Ephesus disciples spoke in tongues upon receiving the Holy Ghost. No one was excluded. Acts 19:6-7
Samaritans - first mention: How did Philip know that none of the Samaritans received the Holy Ghost after believing the gospel and being water baptized in the name of the Lord Jesus? And what did Simon see that made him understand they all received the Holy Ghost when Peter and John came days later and laid hands on them to receive? The obvious answer is their being indwelt by the Holy Ghost was confirmed by speaking in tongues as established by the First Mention Principle established elsewhere in scripture. Acts 8:16-20
As for the spiritual gift of speaking in tongues - not everyone will be used in the gift of speaking a message in an unknown tongue which is then interpreted by an individual having the gift of interpretation for edification of the church body.
I did not understand the distinction between the two types of tongues until God used me to speak a message in tongues in a church setting. The two experiences definitely differ. I know because I speak in tongues in prayer on a regular basis whereas the tongues experience in church happened only one time and that was years ago.
Notice Paul said he speaks in tongues more than the Corinthians, but not in church. This confirms he prayed to God in tongues a lot and in doing so received personal edification. 1 Cor 14:2-4
1 Cor 14:18-19
I thank my God, I speak with tongues more than ye all:
Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue.