This is not a matter of preferring one to the other. If it is, God stands the most preferable. in Quran it is said:
وَالَّذِينَ آمَنُوا أَشَدُّ حُبًّا لِّلَّهِ
This is the mercy of God that He Himself allowed to attend to an immediate necessity first and for that, He has given relaxation in fulfilling His right of worship. This makes us love Him more and believe in Him the wisest and the most merciful.
Having said that, you can adopt all those relaxations of prayer in a journey or prayer of fear in the matters mentioned above, like shortening the prayers of four rakaat to two, combining the prayers of zuhar and asr; and maghrib and Isha, exemption from wudu, you can do the tayammum, etc. and also you can say your prayer with just gestures standing or sitting if movement is not possible.